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<html lang="en">

<head>
    <meta charset="UTF-8">
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    <title>Document</title>
    <style>
        div {
            width: 120px;
            height: 58px;
            background-image: url(./images/bg1.png);
            text-align: center;
            line-height: 50px;
            color: #fff;
        }

        div:hover {
            background-image: url(./images/bg2.png);
        }
    </style>
</head>

<body>
    <div>联系我们</div>
</body>

</html>